French Phrase
Tu dois annuler au moins 48 heures avant.
Meaning
This sentence tells someone that they are required to cancel at least 48 hours in advance. It combines the modal verb devoir (must) with the infinitive annuler (to cancel) and the time expression au moins 48 heures avant (at least 48 hours before). The tone is informal because of the familiar 'tu', but the structure is still polite and clear.
When to use
Use this phrase when you are setting a cancellation policy for appointments, reservations, or events, especially in a casual conversation with a friend, client, or colleague. It’s common in contexts like booking a hotel room, scheduling a meeting, or signing up for a class.
✦Grammar Breakdown
Tudoisannuleraumoins48heuresavant
Devoir + infinitive
The verb devoir followed by an infinitive expresses obligation (must, have to). Here, 'dois annuler' means 'must cancel'.
Au moins
A fixed expression meaning 'at least'. It quantifies the minimum amount of time required.
48 heures avant
A time phrase that specifies the deadline. It can be replaced by 'deux jours avant' for a more natural feel.
Tu vs Vous
Use 'tu' for informal contexts; switch to 'vous' for formal or business situations.
🗨In Conversation
Je veux réserver la salle pour notre réunion.
I want to book the room for our meeting.
Tu dois annuler au moins 48 heures avant si tu ne peux plus venir.
You have to cancel at least 48 hours in advance if you can’t come.
✕Common Mistakes
Tu doit annuler au moins 48 heures avant.
The verb must agree with the subject 'tu', so it should be 'dois', not 'doit'.
Tu dois annuler moins 48 heures avant.
Learners sometimes forget the preposition 'au' before 'moins'. It should be 'au moins', not just 'moins'.
Tu dois annulation au moins 48 heures avant.
Do not use the noun 'annulation' here; the verb form is required after devoir.
↔Alternatives
Il faut annuler au moins 48 heures à l'avance.
You need to cancel at least 48 hours in advance.
Merci d'annuler au moins deux jours avant.
Please cancel at least two days ahead.
Veuillez prévenir 48 heures avant pour toute annulation.
Please give notice 48 hours before any cancellation.
Cultural Tip
In French‑speaking countries, giving a 48‑hour notice is a standard courtesy for many services (restaurants, hotels, language classes). Using the familiar 'tu' is fine with friends or when the service provider has invited you to do so; otherwise, switch to the formal 'vous' (Vous devez annuler…) to stay polite in professional settings.